Giro Prolight Bike Helmet Review

Giro Prolight Helmet, Black Carbon

Giro Prolight Rating: 4.6

Build Quality

The GoodAdvantages:

  • Comfortable
  • Lighter than light
  • Good and simple fit system
  • Good airflow, thanks to internal air channeling

The BadDisadvantages:

  • Small vents

Giro just released the Prolight, the lightest helmet on the planet. They achieved this by not using their proprietary composite subframe. This made it possible for the Prolight to be lighter. It also made it technically impossible to have bigger vents. It’s the perfect helmet to have, if being lightweight is what you’re after.

Giro Prolight has smaller vents than other high-end helmets. Does this impact its ability to maintain adequate airflow? Not much. The Prolight has internal ventilation channels which circulate the air right above the rider’s head. This offers a far better cooling effect than a helmet with bigger vents and no internal channeling.

Prolight vs Ionos: The similarly priced high-end helmet, Giro Ionos, has bigger vents and internal channels. So the airflow there is better than in Giro’s Prolight. But the Ionos is also heavier. So if you don’t need the absolute best ventilation, get the Prolight from CRC or Amazon.

Giro Prolight Helmet, Black CarbonGiro Prolight Helmet, Blue BlackGiro Prolight Helmet, White Silver

Giro Prolight Helmet, Red BlackGiro Prolight Helmet, Red Black, Back ViewGiro Prolight Helmet, Red Black, Top View

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Weighing in at 175g for the small size (around 185g and 195g for the medium and large sizes, respectively), the Prolight is definitely the lightest helmet. Its light weight and comfortable fitting system makes it really appealing to riders who want no constraints. You’ll barely feel it on your head.

Giro Prolight helmet features the tri-position Roc Loc SL adjustment system. It consists of 3 positions on each side of the helmet. This is a one-time adjustment, which means that you won’t need to adjust it each time you put your Prolight on.

Giro Prolight Helmet Specifications:

  • Vents : 25, with Internal Channeling
  • Sizes :
    S (20”-21.75” / 51-55 cm)
    M (21.75”-23.25” / 55-59 cm)
    L (23.25”-24.75” / 59-63 cm)
  • Certification : CPSC
  • MSRP : $200
  • In-Mold Construction
  • Roc Loc SL Adjustment System
  • Tri-Position Roc Loc SL Fore + Aft simple one-time adjustment
  • Super Fit Sizing
  • Weight : 175g

Giro Prolight is light, has a very good fit system, and is comfortable. It’s very well ventilated. Less so than other high-end helmets, but still, the airflow in the Prolight is better than most lower priced ones. So if you decide that you want the lightest helmet, you can buy it here or here.

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